According to AAA, the national average price for a gallon of gas is $3.45. Drivers in Oklahoma City are paying $3.42, while people in Tulsa are filling up for $3.34 a gallon.

In other parts of the country, such as Columbia, South Carolina, a gallon of gas is selling for less than $3.

"There are 17 states with cheaper gas price average today than Oklahoma. We've almost never seen that happen before," said Chuck Mai with AAA Oklahoma.

Mai said there's one big reason for the big jump.

"Some refineries in Illinois, believe it or not, are having maintenance problems. They are down and so product is being taken from Oklahoma and other Midwestern states to satisfy the demand," said Mai.

Sources say that problem is expected to be fixed within a week.

Some experts are predicting a drop in prices this summer. The price of gas in Oklahoma City has already dropped a few pennies in the last few days. By the fall, some analysts are predicting gas prices could drop below $3 a gallon.

Even at the current average in Oklahoma City, gas is still about 50 cents cheaper than the all-time high price of nearly $4 a gallon in 2008.